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Budget Information

SR 525 - SB Alderwood Mall Pkwy - Intersection Improvements

Project News

The new traffic signal was activated June 29, 2018.

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Overview

Contractor crews have installed a traffic signal at the intersection where the southbound State Route 525 off-ramp meets Alderwood Mall Parkway in Lynnwood. There is also an on-ramp at this location to southbound SR 525, where drivers can access southbound Interstate 5 and I-405. Both ramps have been restriped, along with Alderwood Mall Parkway through the intersection. A crosswalk was installed on the east side of the intersection and other improvements have created better sidewalk connections for people of all abilities.

Why is WSDOT improving this intersection?
An increasing number of vehicles use this intersection with currently up to 2,700 vehicles per hour during peak periods. From 2011 to 2015, there were 32 collisions at the intersection. Left alone, the crash rate was expected to remain the same or possibly increase as development grows in the area.

A traffic signal and improved striping are expected to increase line of sight, reduce collisions and improve traffic flow at the intersection. We considered installing a two-lane roundabout but decided against it because of possible backups from nearby traffic signals.

The End Result

This project will create a more efficient intersection with a reduced risk of collisions.

Needs & benefits

Safety: Improvements to this intersection will decrease the risk of severe collisions.

Pedestrian mobility: Creating better sidewalk connections for people of all abilities will increase safety and mobility in the area.